JP4650853B2 - Metal chip removal device in fluid pipe - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention collects and removes metal powder generated at the time of drilling the branch hole when the branch hole for dividing the main pipe into the branch pipe is drilled without blocking the fluid flow in the main pipe. The present invention relates to an improvement of a metal chip removing device that can be used.
[0002]
[Prior art]
In the method of attaching a branch pipe to the main pipe without blocking the flow of fluid such as gas, the metal powder generated when drilling the branch hole in the main pipe remains in the main pipe and connection pipe near the cutting part. When the installation work of the branch pipe is completed in the state where it is in a closed state, the metal powder flows in the main pipe or the branch pipe together with the fluid and bites into a valve provided in the middle to cause a sealing failure or the fluid is tap water, etc. In some cases, it may be mixed with drinking water.
[0003]
In order to prevent the occurrence of such a problem, the applicant of the present application inserts an adsorbent body having a permanent magnet from the connecting pipe side toward the main pipe, and adsorbs the metal powder generated when the branch hole is drilled. Has devised a metal chip removal device that can be collected in advance, and has previously filed a patent application (see JP-A-9-47910).
[0004]
[Problems to be solved by the invention]
In the above-described metal chip removal device of the prior application, since the adsorption area of the adsorbent surface is limited, if metal powder adheres to the entire adsorption surface of the permanent magnet, the adsorption efficiency decreases, When a large amount of metal powder is generated, such as when a large branch hole is drilled in a large-diameter main pipe, it may be left behind.
[0005]
Moreover, there was a problem that the adsorption state of the metal powder could not be confirmed.
[0006]
The present invention was made to solve the above problems, and even if the amount of generated metal powder is large, it can be collected and removed almost completely, and the adsorption state of the metal powder can be changed. An object of the present invention is to provide a metal chip removing device in a fluid pipe which can be directly visually confirmed.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a metal chip removing device according to the present invention includes a joint mounted on an outer peripheral wall of a metal main pipe, a connection pipe provided in a direction substantially orthogonal to the main pipe, and the connection pipe An auxiliary pipe to which a drilling device is attached, a guide pipe integrally connected to an outer peripheral wall of the auxiliary pipe , and communicated with a predetermined angle with respect to the connection pipe, and inserted into the guide pipe And an operating rod having flexibility that can be operated from the outside and being capable of advancing and retreating toward the connecting tube and the main tube, and an adsorbent body provided with a permanent magnet at the tip of the operating rod. In the metal chip removal device in the fluid pipe,
An opening / closing valve in which a valve element is disposed between one opening and the other opening, and an upper opening end of the guide pipe is connected to the one opening, and opens and closes the passage of the guide pipe;
An auxiliary guide pipe to which a front end opening is attached to the other opening of the on-off valve;
A closing member that is detachably attached to a rear end opening of the auxiliary guide tube and through which the rear end of the operation rod is inserted.
According to the present invention having the above-described structure, if the adsorbent that adsorbs the metal powder is pulled up into the auxiliary guide tube and the on-off valve is closed, the fluid is prevented from flowing into the auxiliary guide tube. And the adsorption state of the metal powder can be directly confirmed visually.
Moreover, according to the adsorption state, the on-off valve can be opened again to insert the adsorbent, and the metal powder can be collected again.
[0008]
In the above apparatus, it is preferable that the adsorbent is detachably attached to the tip of the operating rod.
If it does in this way, when inserting an adsorption body repeatedly, it can replace with the adsorption body prepared separately, and can insert quickly, without removing the metal powder adsorbed to it.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example in which an embodiment of the present invention is applied to a method of connecting branch pipes without interrupting the flow of fluid will be described with reference to FIG.
[0010]
Since the branch pipe connection method is not directly related to the present invention, a detailed description thereof will be omitted.
[0011]
In FIG. 1, reference numeral 1 denotes a ductile cast iron main pipe through which a fluid such as gas flows, and a half joint 3 having a connection pipe 2 is hermetically attached to the outer peripheral surface thereof.
[0012]
A base plate 4 is fixed to the upper surface of the connecting pipe 2 by a chain-type fastener (not shown), and a lower end of an attachment device 6 including a gate valve device 5 and a plug insertion device (not shown) is provided on the upper portion thereof. The portion is attached so as to be horizontally rotatable around a support shaft (not shown) that faces in the vertical direction.
[0013]
The casing of the gate valve device 5 accommodates two screw rods 8, 8 that can rotate with the angular shaft portion 7 at the upper end, and a sleeve 9 is screwed into each screw rod 8 so that it can only move up and down. . At the lower end of each sleeve 9, a valve holder 11 capable of sealing the insertion hole 10 drilled in the upper part of the connecting pipe 2, and a flexible valve body 12 are attached to the lower end.
[0014]
The valve body 12 includes an elastic seal frame 12a having an outer peripheral shape that can match the inner diameter of the connection pipe 2, and a thin plate 12b made of a flexible rubber or synthetic resin that is held over the entire circumference of the seal frame 12a. ing.
[0015]
When the sleeve 9 is lowered by the rotation of the screw rod 8, the valve body 12 passes through the insertion hole 10 while being elastically deformed, and the seal frame 12 a and the thin plate 12 b expand when contacting the bottom of the connection pipe 2. By closely contacting the inner peripheral wall, the flow path of the connecting pipe 2 is closed.
[0016]
The metal chip removing device 14 of the present invention is bolted to the flange 13 at the open end of the connecting pipe 2 in a sealing manner by a packing 16 interposed on the mating surface of the flange 15.
[0017]
On the upper outer peripheral wall of the substantially cylindrical auxiliary pipe 17 in the metal chip removing device 14, a guide pipe 18 facing the direction of the connecting pipe 2 is inclined at an angle of about 30 ° with respect to the pipe axis of the connecting pipe 2. And are integrally connected so as to cross each other. Further, the upper half of the end portion of the auxiliary pipe 17 on the side of the connecting pipe 2 is notched, and the receiving half 17a of the lower half is connected to the connecting pipe 2 so as to enter the opening of the connecting pipe 2. Yes.
[0018]
A support tube 20 is screwed onto the external thread 19 formed on the outer peripheral surface of the upper opening end of the guide tube 18, and a through hole (in the center) is formed in the external screw 21 formed on the outer peripheral surface of the upper end portion of the support tube 20. An on-off valve 23 having a ball-like valve body 22 with a hole (not shown) is screwed so as to open and close the passage of the guide tube 18.
[0019]
The valve body 22 of the opening / closing valve 23 can be opened and closed by rotating a lever 25 fixed to the valve shaft 24.
[0020]
The leading end portion of the auxiliary guide tube 27 is screwed to the female screw 26 formed on the inner surface of the rear end opening of the on-off valve 23.
[0021]
A closing cap 29 is detachably attached to a male screw 28 formed on the outer peripheral surface of the rear end opening of the auxiliary guide tube 27.
[0022]
In the connecting pipe 2, the guide pipe 18 and the auxiliary guide pipe 27, an operation rod 30 is accommodated so as to be inserted through the through hole of the valve body 22 in an open state, and a substantially cylindrical shape is formed at the tip thereof. An adsorbent 31 is attached.
[0023]
The operation rod 30 is configured by inserting an elastic wire material (not shown) such as a piano wire into a flexible tube 30a such as nylon, and can be bent elastically.
[0024]
The adsorbent 31 is configured by sandwiching a plurality of ring-shaped permanent magnets 33 by three synthetic resin holding members 32 at the front and rear and the center, and the entire length is almost accommodated in the main pipe 1. It is said to be long.
[0025]
The rear end portion of the operating rod 30 is inserted in a sealing manner into a dust seal 35 fitted in the insertion hole 34 at the center of the closing cap 29, and a handle portion 36 is attached to the protruding end.
[0026]
Next, the usage point of the metal chip removal apparatus 14 of the said embodiment is demonstrated.
[0027]
The device 14 of the present invention is used after the drilling process of the main pipe 1.
[0028]
That is, the center drill 39 and the cylindrical cutter 40 in the drilling device 38 attached to the flange 37 of the auxiliary pipe 17 are advanced, the branch hole 41 is drilled in the side wall of the main pipe 1, and the cut piece 42 is held. After the cutter 40 is retracted in this state, the adsorbent 31 that has been pulled up to a position where it does not interfere with the cutter 40 is pushed in with the handle 36, and its tip abuts against the inner wall of the main pipe 1 through the branch hole 41. Let In addition, the valve body 22 of the on-off valve 23 is opened at the time of this insertion.
[0029]
Thereby, the metal powder dropped on the inner bottom surfaces of the main pipe 1 and the connecting pipe 2 when the branch hole 41 is drilled is attracted and collected by the permanent magnet 33 of the attracting body 31.
[0030]
Next, the operating rod 30 is pulled by holding the handle portion 36 and the adsorbing body 31 is pulled up into the auxiliary guide tube 27 as shown by a two-dot chain line, and then the valve body 22 of the opening / closing body 23 is closed to discharge the fluid. To prevent.
[0031]
Next, when the closing cap 29 is removed and the adsorbent 31 is taken out, the adsorption state of the metal powder can be directly confirmed visually.
[0032]
When the amount of adsorbed metal powder is large and it is expected that metal powder still remains in the main pipe 1, after removing the metal powder from the permanent magnet 33, the closure cap 29 is attached to the auxiliary guide pipe 27 again. Then, the valve body 22 is opened and the adsorbent 31 is pushed into the main pipe 1 to re-adsorb the remaining metal powder.
[0033]
Thereafter, the adsorbent 31 is taken out as described above, and the adsorption state of the metal powder is confirmed.
[0034]
If this operation is repeated and the metal powder is no longer adsorbed on the adsorbent 31, the metal powder in the tube is almost completely removed.
[0035]
After removing the metal powder in the pipe, the valve body 12 of the gate valve device 5 is lowered to temporarily shut off the flow path in the connecting pipe 2, and then the metal chip removing device 14 and the punching device 38 are removed. The branch pipe (not shown) is connected to the connection pipe 2. Further, since the metal powder dropped on the tray 17a of the auxiliary pipe 17 before the adsorber 31 is pulled up into the auxiliary guide pipe 27 is removed together with the removal of the auxiliary pipe 17, the branch pipe is connected to the connecting pipe 2. In holding, there is no fear that the metal powder will disturb the watertight connection.
[0036]
Next, after pulling up the valve body 12 to circulate the fluid through the branch pipe, the plug insertion device is operated, the insertion hole 10 is sealed with the plug, and finally the attachment device 6 is removed, and the series of steps is completed. To do.
[0037]
The present invention is not limited to the above-described embodiment, and can take various embodiments.
[0038]
In the above embodiment, the adsorbent 31 is integrally attached to the tip of the operation rod 30, but for example, as shown in FIG. A female screw hole 44 is formed in the portion, and the male screw 46 of the elastic wire 45 at the tip of the operation rod 30 is screwed into the female screw hole 44 so that the adsorbent 31 can be removed from the operation rod 30. Also good.
[0039]
In this way, when the adsorbent 31 is taken out and inserted again, the metal powder adsorbed on the adsorbent 31 is replaced with a separately prepared adsorbent 31 without being removed each time. Can be inserted again.
[0040]
The closing cap 29 is attached to the auxiliary guide rod 27 with a screw, and an elastic material such as rubber is fixed to one of the fitting surfaces, and the closing cap 29 is one-touched using its elastic deformation. It may be made detachable.
[0041]
Although the on-off valve 23 is attached to the guide tube 18 via the support tube 20, the support tube 20 may be omitted and directly attached to the guide tube 18.
[0042]
Of course, the shape of the adsorbent 31 may be oval or polygonal in addition to the above embodiment.
[0043]
【The invention's effect】
The present invention has the following effects.
[0044]
(A) According to the first aspect of the present invention, if the adsorbent that has adsorbed the metal powder is pulled up into the auxiliary guide tube and the on-off valve is closed, the fluid is prevented from flowing into the auxiliary guide tube. The adsorbent can be taken out and the adsorbed state of the metal powder can be directly confirmed visually.
Also, depending on the adsorption state, it is possible to reattach the blocking member, open the on-off valve, insert the adsorbent, and re-collect the metal powder, so that the metal powder in the tube is almost complete regardless of the amount. Removed.
[0045]
(B) According to the invention described in claim 2, when the adsorbent is repeatedly inserted, the metal powder adsorbed on the adsorbent is replaced with a separately prepared adsorbent immediately without being removed each time. Work can be started.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of the present invention and a main pipe joint portion to which the present invention is applied.
FIG. 2 is a partially cutaway enlarged side view of a main part showing another form of attachment of the operating rod and the adsorbing body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main pipe 2 Connection pipe 3 Joint 4 Base plate 5 Gate valve apparatus 6 Mounting apparatus 7 Square shaft part 8 Screw rod 9 Sleeve 10 Insertion hole 11 Valve holder 12 Valve body 13 Flange 14 Metal chip removal apparatus 15 Flange 16 Packing 17 Auxiliary pipe 17a Receptacle part 18 Guide pipe 19 Male screw 20 Support cylinder 21 Male screw 22 Valve body 23 On-off valve 24 Valve shaft 25 Lever 26 Female screw 27 Auxiliary guide pipe 28 Male screw 29 Blocking cap (blocking member)
30 Operation rod 31 Adsorber 32 Holding member 33 Permanent magnet 34 Insertion hole 35 Dust seal 36 Handle part 37 Flange 38 Punching device 39 Center drill 40 Cutter 41 Branch hole 42 Cutting piece 43 Core material 44 Female screw hole 45 Elastic wire material 46 Male screw

Claims (2)

A joint mounted on an outer peripheral wall of a metal main pipe, a connection pipe provided in a direction substantially orthogonal to the main pipe, an auxiliary pipe connected to the connection pipe and to which a perforating device is attached, and an outer circumference of the auxiliary pipe A guide tube that is integrally connected to the wall and communicated with a predetermined angle with respect to the connection tube; and a flexible tube that is inserted into the guide tube and can be operated from the outside. In an apparatus for removing metal chips in a fluid pipe, comprising an operating rod provided so as to be able to advance and retract toward the pipe, and an adsorbent provided with a permanent magnet at the tip of the operating rod,
An opening / closing valve in which a valve element is disposed between one opening and the other opening, and an upper opening end of the guide pipe is connected to the one opening, and opens and closes the passage of the guide pipe;
An auxiliary guide pipe to which a front end opening is attached to the other opening of the on-off valve;
An apparatus for removing metal chips in a fluid pipe, comprising: a closing member that is detachably attached to a rear end opening of the auxiliary guide pipe and through which a rear end of the operation rod is inserted.   The apparatus for removing metal chips in a fluid pipe according to claim 1, wherein the adsorbent is detachably attached to the tip of the operating rod.

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